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Net Income (Loss) Per Share (Tables) | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Schedule of Earnings (Losses) Per Share, Basic and Diluted [Table Text Block] | The following table presents the computation of net income (loss) per share on a basic and diluted basis for the years ended December 31 (shares in thousands):
|  | 2021 |  | 2020 |  | 2019 |
Net income (loss) attributable to shareholders |  | $ | 1,108,197 |  |  | $ | 584,438 |  |  | $ | (204,087) |  |
Weighted-average shares outstanding - basic |  | 72,472 |  |  | 77,992 |  |  | 83,568 |  |
Net effect of various dilutive stock-based compensation awards |  | 913 |  |  | 643 |  |  | — |  |
Weighted-average shares outstanding - diluted |  | 73,385 |  |  | 78,635 |  |  | 83,568 |  |
Net income (loss) per share: |  |  |  |  |  |  |
Basic |  | $ | 15.29 |  |  | $ | 7.49 |  |  | $ | (2.44) |  |
Diluted (a) |  | $ | 15.10 |  |  | $ | 7.43 |  |  | $ | (2.44) |  |
(a)Stock-based compensation awards for the issuance of 1,143 shares and 1,614 shares for the years ended December 31, 2020 and 2019, respectively, were excluded from the computation of net income (loss) per share on a diluted basis as their effect was anti-dilutive. As the company reported a net loss attributable to shareholders for 2019, basic and diluted net loss per share attributable to shareholders are the same.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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